They need at least one more factory in addition to the one in Constantinopolis to reinforce the fronts. I guess they can get away without the Baghdad factory.

The only reason I suggested splitting off Sinai is more to give the Ottomans a bit of early expansion; don't know if that would make Egypt too easy to defend. I like the idea of adding the Senussi front, most people don't know about that and you don't see it in many maps. I agree that central Arabia should be impassable. Though, I wouldn't give the Ottomans too many factories as they were pretty unindustrialized.

I'm not sure what the best way to split the Ottoman territories is.

Constantinopolis will obviously have both a factory and a dockyard. I'm also thinking about giving both Damascus and Baghdad a factory as well. Splitting Sinai would make defending Suez way too easy, I guess. I would put a few Ottoman infantry units in the Libyan Desert as well to represent the Senussis and make things more interesting.

Arabia could be better off being impassable.

@TheDog Also adding territoryEffects to the map can simulate this further, like mountain territories in Northern Italy/Caucasus. Maybe only a mountaineer unit can have good combat and don’t get debuffs